My late Uncle killed all of his with a .243. Always told me to just aim for the eye! I use my 30.06. An average hog is around 150 lbs or less so unless you're going after Hogzilla, I would leave the cannon at home.
A buddy just recently went on a hunt at a ranch in North Texas and took his 30-378 and his 45-70, they wouldn't let him use them, they gave him an SKS to use instead. I think a .270 would be perfect. My last hunt I went on, I was using the 30.06 and had the kid using the .223.

We are talking about russian boars here though. Not ferrel hogs Bubba. I have seen russian boars take 3 square hits in the chest with an 06 and not fall.. That said my 270 dropped that same hog with a shot behind the ear. Personally after many years of chasing russian boar, and being tree'd a few times, I wouldn't go out with anything less than an 06. Ferral hogs are another situation. they don't tend to chase you as much when they are wounded.

It depends on how you are hunting them. If your hunting with dogs, and they are cornered, or perhaps close range from a tree stand, the Casual will work great. I always kept a 357 with hot loads under my armpit while hunting russian boars. If I wounded a boar or had a sow turn on me, I would drop the rifle and head for the tree. They are a whole lot faster than you think when they are pissed off about your existance. Once they got to the bottom of the tree they got treated to a 357 right through the top of their head. True russian boars do not get real big. 250-300 is a whopper for true bloods. Not sure there are many pure russian boars around though. Most got some feral in them. We looked for the 100 to 150 pound class hog. better eating.

Best hog medicine that I have found is a good sharp Ka Bar or any other sharp knife like that. I am using my Buck Nighthawk tomorrow night.

As for a gun ANY deer rifle will work just fine. Just make sure that you know where the heart and lungs actually are on them. If you shoot them where you would a deer you are going to miss most of the vitals.

She did not make the LONG drag back to the truck, so I am not sure how the eating was. Looking back I could have taken the back straps out pretty easy and had them at the very least. I look at it this way, the farmer has about 6-10 less hogs eating his crops soon.

I've killed them with a knife, .22 long rifle, 44 mag, .243, 30-06, shotgun w/ buckshot, 54 cal muzzle loader and a long bow. Most important thing is to get the bullet, blade, broadhead into the proper spot. I shot almost all the wild hogs I kill in the head, unless I'm using a bow. If I had to choose my favorite medicine for wild pork, it would be my 30-06. just cause I love the gun itself. Be careful of bullets like the ballistic tip when shooting lighter grain weights as they can come apart on the shield of a larger boar hog.